The male and female Gripple staff needed to be between 40 and 60 years and not involved currently in any structured fitness activity, other than walking!

The volunteers, from Gripple’s factory floors and office departments, were filmed for a full day as they worked at the Gripple HQ, The Old West Gun Works and the company’s Riverside factory.

The six were ‘put through their paces’ for a few days whilst being monitored by scientists from Sheffield Hallam University.

At the end of a week the results of the volunteers’ efforts were revealed by Michael Mosley and Prof Robert Copeland from the university when they visited the HQ for filming as part of the show.

One of the volunteers, Judy Rodgers, a sales and research co-ordinator, said: “I recommend that people watch the documentary. I am sure it will make them think and realise the importance of getting fit.”